公开(公告)号：US20220159222A1

公开(公告)日：2022-05-19

申请号：US17649890

申请日：2022-02-03

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Qingfei Chen ,  Rui Wang ,  Wei Wei Wang ,  Zhiyong Zhan ,  Xin Wang ,  Qingwei Shan ,  Kenny Geng

IPC: H04N9/04 ,  H04N5/369 ,  H04N5/378 ,  H04N5/3745

Abstract: An imaging device includes groupings of photodiodes having four photodiodes. A transfer transistor is between each photodiode and a floating diffusion. Each floating diffusion is coupled to up to two photodiodes per grouping at a time through transfer transistors. A buffer transistor is coupled to each floating diffusion. The buffer transistors may be in a first or second grouping of buffer transistors. A first bit line is coupled to up to two buffer transistors of the first grouping and a second bit line is coupled to up to two buffer transistors of the second grouping of buffer transistors at a time. A color filter array including a plurality of groupings of color filters is disposed over respective photodiodes of the photodiode array, wherein each grouping of color filters includes four color filters having a same color, wherein each grouping of color filters overlaps two groupings of photodiodes.

公开(公告)号：US12199632B2

公开(公告)日：2025-01-14

申请号：US18176373

申请日：2023-02-28

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Hiroaki Ebihara ,  Chengcheng Xu ,  Satoshi Sakurai ,  Kenny Geng

IPC: H03M1/46

Abstract: A tail current source of a comparator includes a first transistor and a second transistor configured to operate as current sources, wherein the first and second transistors are coupled between a tail node of the comparator and a voltage node, and wherein the tail comprises a node coupled to first and second inputs of the comparator. The tail current source also includes a switch configured to selectively couple the second transistor between the tail and the voltage node, and a bias voltage source coupled to gates of the first and second transistors. The switch is configured to be on during an analog-to-digital conversion (ADC) reset signal period and an ADC image signal period, and the switch is configured to be off during an auto-zero period, a period between the ADC reset signal and image signal periods, and a period after the ADC image signal period.

公开(公告)号：US11476290B2

公开(公告)日：2022-10-18

申请号：US16918929

申请日：2020-07-01

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Hui Zang ,  Gang Chen ,  Kenny Geng

IPC: H01L27/146 ,  H04N5/378

Abstract: An image sensor includes photodiodes disposed in a pixel region and proximate to a front side of a semiconductor layer. A backside metal grating is formed in a backside oxide layer disposed proximate to a backside of the semiconductor layer. A deep trench isolation (DTI) structure with a plurality of pixel region portions and an edge region portion is formed in the semiconductor layer. The pixel region portions are disposed in the pixel region of the semiconductor layer such that incident light is directed through the backside metal grating, through the backside of the semiconductor layer, and between the pixel region portions of the DTI structure to the photodiodes. The edge region portion of the DTI structure is disposed in an edge region outside of the pixel region. The edge region portion of the DTI structure is biased with a DTI bias voltage.

公开(公告)号：US11284045B2

公开(公告)日：2022-03-22

申请号：US16855857

申请日：2020-04-22

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Qingfei Chen ,  Rui Wang ,  Wei Wei Wang ,  Zhiyong Zhan ,  Xin Wang ,  Qingwei Shan ,  Kenny Geng

IPC: H04N5/374 ,  H04N9/04 ,  H04N5/369 ,  H04N5/378 ,  H04N5/3745 ,  H01L27/146

Abstract: An imaging device includes groupings of photodiodes having four photodiodes. A transfer transistor is between each photodiode and a floating diffusion. Each floating diffusion is coupled to up to two photodiodes per grouping at a time through transfer transistors. A buffer transistor is coupled to each floating diffusion. The buffer transistors may be in a first or second grouping of buffer transistors. A first bit line is coupled to up to two buffer transistors of the first grouping and a second bit line is coupled to up to two buffer transistors of the second grouping of buffer transistors at a time. A color filter array including a plurality of groupings of color filters is disposed over respective photodiodes of the photodiode array, wherein each grouping of color filters includes four color filters having a same color, wherein each grouping of color filters overlaps two groupings of photodiodes.